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Second-Best Renewable Subsidies to De-Carbonize the Economy: Commitment and the Green Paradox

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  • Armon Rezai
  • Frederick Van der Ploeg

Abstract

Climate change must deal with two market failures: global warming and learning by doing in renewable use. The first-best policy consists of an aggressive renewables subsidy in the near term and a gradually rising and falling carbon tax. Given that global carbon taxes remain elusive, policy makers have to use a second-best subsidy. In case of credible commitment, the second-best subsidy is set higher than the social benefit of learning. It allows the transition time and peak warming close to first-best levels at the cost of higher fossil fuel use (weak Green Paradox). If policy makers cannot commit, the second-best subsidy is set to the social benefit of learning. It generates smaller weak Green Paradox effects, but the transition to the carbon-free takes longer and cumulative carbon emissions are higher. Under first-best and second best with pre-commitment peak warming is 2.1 - 2.3 °C, under second best without commitment 3.5°C, and without any policy temperature 5.1°C above pre-industrial levels. Not being able to commit yields a welfare loss of 95% of initial GDP compared to first best. Being able to commit brings this figure down to 7%.

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  • Armon Rezai & Frederick Van der Ploeg, 2016. "Second-Best Renewable Subsidies to De-Carbonize the Economy: Commitment and the Green Paradox," CESifo Working Paper Series 5721, CESifo.
    • Handle: RePEc:ces:ceswps:_5721
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    3. van der Ploeg, Frederick & Rezai, Armon, 2017. "Cumulative emissions, unburnable fossil fuel, and the optimal carbon tax," Technological Forecasting and Social Change, Elsevier, vol. 116(C), pages 216-222.
    4. Baldwin, Elizabeth & Cai, Yongyang & Kuralbayeva, Karlygash, 2017. "Build Today, Regret Tomorrow? Infrastructure and Climate Policy," Conference papers 332887, Purdue University, Center for Global Trade Analysis, Global Trade Analysis Project.
    5. van der Ploeg, Frederick, 2020. "Race to burn the last ton of carbon and the risk of stranded assets," European Journal of Political Economy, Elsevier, vol. 64(C).
    6. van der Ploeg, Frederick & Rezai, Armon, 2021. "Optimal carbon pricing in general equilibrium: Temperature caps and stranded assets in an extended annual DSGE model," Journal of Environmental Economics and Management, Elsevier, vol. 110(C).
    7. Malik Curuk & Suphi Sen, 2023. "Climate Policy and Resource Extraction with Variable Markups and Imperfect Substitutes," Journal of the Association of Environmental and Resource Economists, University of Chicago Press, vol. 10(4), pages 1091-1120.
    8. van der Ploeg, Frederick & Rezai, Armon, 2020. "The risk of policy tipping and stranded carbon assets," Journal of Environmental Economics and Management, Elsevier, vol. 100(C).
    9. Shayegh, Soheil & Sanchez, Daniel L., 2021. "Impact of market design on cost-effectiveness of renewable portfolio standards," Renewable and Sustainable Energy Reviews, Elsevier, vol. 136(C).
    10. Dominika Czyz & Karolina Safarzynska, 2023. "Catastrophic Damages and the Optimal Carbon Tax Under Loss Aversion," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 85(2), pages 303-340, June.
    11. Eichner, Thomas & Pethig, Rüdiger, 2019. "EU-type carbon regulation and the waterbed effect of green energy promotion," Energy Economics, Elsevier, vol. 80(C), pages 656-679.
    12. Saeed Solaymani, 2021. "Energy subsidy reform evaluation research – reviews in Iran," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 11(3), pages 520-538, June.
    13. Najm, Sarah, 2019. "The green paradox and budgetary institutions," Energy Policy, Elsevier, vol. 133(C).
    14. Elizabeth Baldwin & Yongyang Cai & Karlygash Kuralbayeva, 2018. "To Build or Not to Build? Capital Stocks and Climate Policy," CESifo Working Paper Series 6884, CESifo.
    15. Richard S. J. Tol, 2021. "Estimates of the social cost of carbon have increased over time," Papers 2105.03656, arXiv.org, revised Aug 2022.
    16. Maria Belfiori & Armon Rezai, 2019. "Optimal Climate Policy: Making do with the taxes we have," 2019 Meeting Papers 1029, Society for Economic Dynamics.
    17. Najm, Sarah & Matsumoto, Ken'ichi, 2020. "Does renewable energy substitute LNG international trade in the energy transition?," Energy Economics, Elsevier, vol. 92(C).
    18. van der Ploeg, Frederick, 2016. "Second-best carbon taxation in the global economy: The Green Paradox and carbon leakage revisited," Journal of Environmental Economics and Management, Elsevier, vol. 78(C), pages 85-105.
    19. Ahn, Kwangwon & Chu, Zhuang & Lee, Daeyong, 2021. "Effects of renewable energy use in the energy mix on social welfare," Energy Economics, Elsevier, vol. 96(C).
    20. Kollenbach, Gilbert & Schopf, Mark, 2022. "Unilaterally optimal climate policy and the green paradox," Journal of Environmental Economics and Management, Elsevier, vol. 113(C).
    21. Michael Grubb & Rutger-Jan Lange & Nicolas Cerkez & Pablo Salas & Ida Sognnaes, 2020. "Interactions of time and technology as critical determinants of optimal climate change policy," Tinbergen Institute Discussion Papers 20-083/VI, Tinbergen Institute, revised 29 Dec 2022.
    22. Zhishuang Zhu & Hua Liao, 2019. "Do subsidies improve the financial performance of renewable energy companies? Evidence from China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 95(1), pages 241-256, January.
    23. Kalkuhl, Matthias & Steckel, Jan Christoph & Edenhofer, Ottmar, 2020. "All or nothing: Climate policy when assets can become stranded," Journal of Environmental Economics and Management, Elsevier, vol. 100(C).
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    More about this item

    Keywords

    first-best and second-best policy; commitment; Markov-perfect; Ramsey growth; carbon tax; renewables subsidy; learning by doing; directed technical change;
    All these keywords.

    JEL classification:

    • H21 - Public Economics - - Taxation, Subsidies, and Revenue - - - Efficiency; Optimal Taxation
    • Q51 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Valuation of Environmental Effects
    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming

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